On Oct 28, 2011, at 11:45 PM, Murray S. Kucherawy wrote:

I've got a separate draft that adds to Received: fields a tag that indicates transitions of messages into administrative hold states (quarantining, timed delivery and list moderation are included in the initial list of reasons) ready to go. I just missed the -00 submission deadline prior to the next IETF meeting in November, so it's not in the IETF datatracker but it is here: http://www.blackops.org/~msk/draft-kucherawy-received-state.txt. Comments welcome.

The idea: When the MLM selects a message for moderation it would a Received: field with such a tag, and then on release the next MTA in the chain adds another Received: as per normal which, presumably, completes the handling chain in a way that the end user can see what happened (i.e., when it entered the hold and when it came out).

This doesn't include a mechanism for tracking who did the approval, but you've got that separately on your list anyway.

That's pretty interesting. Currently MM3 doesn't add any Received headers, but this bug tracks that:

https://bugs.launchpad.net/mailman/+bug/885715

-Barry